Climate Insights for That Phanom

The climate in That Phanom is hot. The average annual temperature is 27°C and approximately 1586mm of precipitation falls per year. July is the wettest month, receiving around 352mm of rainfall. That Phanom is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: April, May, March. The coldest months are January, December, February, when temperatures can drop to 17°C.

That Phanom sees moderate temperature variation throughout the year, ranging from 17°C to 35°C. The warmest month is April, when average highs reach 35°C and the mean temperature sits around 29°C. January is the coolest month, with minimum temperatures around 17°C and an average of 22°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between February and March, with a 3°C shift in average temperatures.

That Phanom is a fairly wet location, receiving approximately 1586mm of precipitation annually, which averages out to around 132mm per month. The wettest month is July, averaging 352mm of rainfall. August and September also tend to see above-average precipitation. The driest month is December, with just 5mm. That's 347mm less than July, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

That Phanom is mildly breezy, with an average annual wind speed of 13km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 17km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 10km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 7km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 16km/h in winter, 12km/h in spring, 13km/h in summer, 12km/h in autumn.

It is currently spring in That Phanom, which began on March 20, 2026. That Phanom is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in April at around 35°C, while the coldest stretch bottoms out in January near 17°C. Summer is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit That Phanom is during January, February and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 23°C with modest rainfall averaging 11mm per month. By contrast, April can be uncomfortably hot with temperatures reaching 35°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for That Phanom based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.